package collection;

import com.sun.org.apache.xpath.internal.objects.XString;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;

public class CollectionDemoTwo {
    public static void main(String[] args) {
        Collection c = new ArrayList();
        //Collection c = new HashSet();
        c.add(new Point(1, 2));
        c.add(new Point(3, 4));
        c.add(new Point(5, 6));
        c.add(new Point(7, 8));
        c.add(new Point(9, 10));
        boolean b = c.add(new Point(1, 2));
        System.out.println(b);
        System.out.println(c);
        Point p = new Point(1, 2);
        //判断集合中是否包含p
        boolean contains = c.contains(p);
        System.out.println(contains);
        c.remove(p);//删除集合中的p
        System.out.println(c);
    }
}
